Wrench



B, F. NIGHTLINGER, sR.

WRENCH. APPLICATION FILED JULY 7. I919. RENEWED FEB. 28, 1922.

Patented Apr. 11, 1922.

ATYOR/I/EKS BENJAMIN raj-fitxmn N GHT INGER SR,

raiaroa. I V

Application filediuly 7, 1919, Serial No. 308,928.

To all whom it may concern:

Be it known that I, BENJAMIN F. Nienr LlNGER, S12, a citizen of the United States, and a resident of Duluth, in themcounty of Saint Louis and State of Minnesota, have invented certain new and useful Improvements in Wrenches, of which the following is a specification.

This invention is an improvement in wrenches and has reference more particularly to a pipe wrench in which a handle, having a rigid jaw member at one end is provided with a movable outer jaw member pivotally connected therewith.

An object of the invention is to provide a pipe wrench in which few parts are used and which shall be simple, cheap and effi cient in operation and permit its use with various sizes of pipes, rods, etc., within reasonable limits, without changing the relative arrangement of the necessary parts.

With these and other objects. in view, the invention consists in certain features of construction, arrangement and combination of parts as will be hereinafter described and pointed out in the claims, reference being had to the accompanying drawing forming a part hereof, and in which Figure 1 is a side elevation of the improved wrench, as in use,

Figure 2 is a similar view as used with a smaller pipe,

Figure 3 is a side elevation showing the movable jaw as about to be applied,

Figured is a perspective view of the front end of the stationary jaw,

Figure 5 is a sideelevation of the movable jaw detached.

Referring more particularly to the drawings in Figures 1, 2 and 3, A represents the lever handle of suitable length having adj acent its upper end the spaced apart checks at which are located at each side of a circular socket a as indicated by dotted lines in Figure 1; the cheeks a are pierced in alinement to receive a screw bolt (4 which is passed through said cheeks a and the circular tongue I) of a-hook-shaped jaw B, which will be later described, and held in place by a nut a Beyond the cheeks a, the lever handle has an extended portion A, the inner edge of which is slightly curved and has the teeth or serrations A extending across such curved portion.

The movable jaw member B is hookarsrtr creme..-

OF DULUTH, ,MINNESOTA.

WRENCH.

Specification-of Letters Patent. Patented Apr. 111, 1922.

Renewed February 28, 1922. Serial to. 539,908.

shaped, one arm of which isprovided with the reduced" circular tongue Z), which as hereinbefore set forth fits in socket a of the lever handle A and is held rotatably therein by the screw bolt a The shank B of the hook member has its inner face on a curve, such face being preferably smooth up to the point x where it meets angularly the inner serrated face of the nose B of the hook member, which inner serrated face is also on a curve.

The outer curved edge of the hook member may be brought down to a webbed or spinal back in order to brace the back and to keep it from springing when pressure is placed on the lever wise to give extra strength in the back of the hook member.

The movable jaw member is made hookshaped, as shown in Figure 1. The jaws are centered on the top line of the handle A. The inside of the shank B of the hook member is curved, permitting the pipe, rod, etc., to fall within the line of pull, as shown by the line 1-2. The serrated or toothed surface of the noseB as shown by the arc 5-6, is so constructed that the surface makes a false circle to the center point of a The construction and arrangement of the parts as indicated above causes the movable jaw to draw over the pipe instead of hopping OK when pressure is put on the handle, thus giving it an instantaneous grip. The relative arrangement of the stationary jaw is so designed that the movable jaw falls over the end of it, and any pressure put upon the handle causes the stationary jaw to run under the pipe P while the movable jaw pulls to and over it.

It will be noted that there are three points of contact with the pipe so that it is gripped with even pressure and can be readily turned by swinging the handle to the left, and that it will be so firmly held that it cannot slip within the space between the movable and the stationary jaw.

The wrench should be made of steel, and may be drop-forged or made under a press, and the stationary jaw is preferably made heavier and fuller at the bottom of the front end as indicated by A I claim A wrench as herein set forth consisting of a lever handle member having a slightly or handle, and otherof the hook member,

curved rigid aw'member at its outer end, the upper surface of said jaw being serrated, the points of the teeth thereof forwardly; a circular socket Within the handle at the inner extremity rated portion, spaced and perforated cheeks enclosing said socket, a hook-shaped movable jaw member comprising a shank having a reduced tongue at one end ,pivotally held Within said socket the pivotal point being upon the top line of the handle member, and a nose at the opposite end, the inner face of the shank being smooth and struck on a relatively fiat arc, the inner face of the projecting I of said sennose also struck on a slight arc; said last named arc intersecting the arc of the smooth inner face of the shank angu larly and having serrations on said arc, pivotal means connecting the movable jaw with the lever handle on the top line of the handle, Whereby the arc of movement of the movable jaw itself and the curvature of the inner serrated face of the nose thereof WillJIlBSCIlbfidlfferent intersecting circles, the point of such intersection coinciding with the point" of intersection of the serrated nose portion and the-smooth inner shank portion. 3

BENJAMIN FRANKLIN NIGHTLINGER, Sr; 

